首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   31195篇
  免费   1338篇
  国内免费   25篇
  2020年   341篇
  2019年   422篇
  2018年   602篇
  2017年   572篇
  2016年   652篇
  2015年   427篇
  2014年   532篇
  2013年   2429篇
  2012年   1002篇
  2011年   992篇
  2010年   589篇
  2009年   660篇
  2008年   840篇
  2007年   860篇
  2006年   756篇
  2005年   661篇
  2004年   650篇
  2003年   596篇
  2002年   619篇
  2001年   1057篇
  2000年   1059篇
  1999年   780篇
  1998年   325篇
  1997年   304篇
  1995年   313篇
  1992年   629篇
  1991年   594篇
  1990年   567篇
  1989年   542篇
  1988年   538篇
  1987年   481篇
  1986年   486篇
  1985年   532篇
  1984年   433篇
  1983年   398篇
  1982年   309篇
  1979年   472篇
  1978年   327篇
  1977年   301篇
  1976年   318篇
  1975年   361篇
  1974年   432篇
  1973年   462篇
  1972年   399篇
  1971年   341篇
  1970年   320篇
  1969年   337篇
  1968年   417篇
  1967年   371篇
  1966年   357篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
This study analysed the way 20 managers in the information technology industry in Australia viewed their lives, and identified two dimensions of central importance cutting across the work, family and leisure spheres encompassed by them. One dimension was positively loaded towards activities which were challenging, creative and under the individual's control. These activities were enjoyable, and included examples such as consulting with clients, creating new business, and communicating and dealing with others, whether at work or at home. The opposite pole of this dimension involved activities such as completing paperwork, general administration, doing the shopping, and disciplining the children. Such activities were seen as necessary, routine or stressful, and were generally disliked. The other dimension dealt with activities which, at one pole, were emotionally involving or involved moral standards, and included examples such as attending meetings, doing things as a family, and settling disputes, either at work or at home. At the other pole were activities which were usually done alone and involved no sense of social or moral obligation. Leisure activities typically fell into this category. The results indicated that these managers generally pursued a lifestyle which was seen to be non-stressful, and one valued for the challenge, enjoyment, freedom of choice and personal control which it offered.  相似文献   
962.
Congruence of personality and life events in depression   总被引:2,自引:0,他引:2  
Consistent with the personality-event congruence hypothesis, highly sociotropic depressed patients (n = 19) reported more recent negative interpersonal events than negative autonomy events and more negative interpersonal events than did highly autonomous depressed patients (n = 22), for whom the hypothesis was not supported. There was no evidence of such congruence among nondepressed schizophrenic patients (n = 44). In a second study, there was significant personality-event congruence in dysphoric students (n = 26) but not in nondysphoric students (n = 56). Both the high-sociotropy and high-autonomy dysphoric groups separately yielded nonsignificant trends consistent with congruence. These findings add to the growing support for the importance of the sociotropy construct in depression and weaker support for the autonomy construct or its measurement, and they suggest that the congruence effect does not generalize to all psychopathologies.  相似文献   
963.
Two studies provided evidence that alcohol's relationship to psychological stress is indirect and is mediated by the allocation of attention. Study 1 found that, as the attentional demands of a distracting activity increased, so did alcohol's reduction of anxiety. Study 2 replicated this effect and found that a highly demanding activity could reduce anxiety even without alcohol. This study further implicated the role of attention in anxiety reduction by demonstrating a relationship between changes in anxiety and response latency to a secondary monitoring task. Finally, in both experiments, intoxicated subjects who did not perform any activity showed an increase in anxiety. From these data, we argue that alcohol affects psychological stress, to an important degree, through its ability, in conjunction with ongoing activity, to affect the amount of attention paid to stressful thoughts.  相似文献   
964.
Peer-group association and adolescent tobacco use   总被引:10,自引:0,他引:10  
Mosbach & Leventhal (1988) examined the relation of cigarette smoking to peer-group identification in rural Wisconsin adolescents. They found that among dirts (problem-prone youth), regulars (average youth), hot-shots (good social or academic performers), and jocks (athletes), youth most likely to smoke were dirts and hot-shots. We performed a replication with a Southern California cohort and also for use of smokeless tobacco. We hypothesized that jocks would be the main users of smokeless tobacco. We identified the same groups and an additional one, skaters (skateboarders or surfers). As Mosbach & Leventhal found, cigarettes were used most by dirts. Contrary to their results, but consistent with other research, we found that hot-shots were least likely to smoke. Contrary to our prediction, we found that skaters and dirts were more likely to use smokeless tobacco than were jocks. Our data show that both tobacco forms are used by problem-prone youth.  相似文献   
965.
Endorsement of dysfunctional beliefs depends on current mood state   总被引:2,自引:0,他引:2  
In two studies we tested the hypothesis that endorsement of dysfunctional beliefs depends on current mood state for persons who are vulnerable to depression. The first study showed that reports of dysfunctional beliefs vary with spontaneous diurnal mood fluctuations in 47 depressed psychiatric patients. The effect of mood state was highly significant (p less than .01); dysfunctional thinking increased when mood was worst and decreased when mood was best. The second study conceptually replicated this finding in a population of asymptomatic subjects. As predicted, reports of dysfunctional beliefs varied as a function of mood state in 14 persons who had experienced a depressive episode but not in 27 who had never been depressed. These findings support the cognitive theory of depression, which proposes that dysfunctional beliefs are vulnerability factors for depression but also that reporting of dysfunctional beliefs depends on current mood state.  相似文献   
966.
Selective processing of threat cues in posttraumatic stress disorder   总被引:1,自引:0,他引:1  
Vietnam combat veterans with (n = 15) and without (n = 15) posttraumatic stress disorder (PTSD) performed a modified Stroop task in which they named the colors of neutral words (e.g., INPUT), positive words (e.g., LOVE), obsessive-compulsive disorder (OCD) words (e.g., GERMS), and PTSD words (e.g., BODYBAGS). In contrast to normal controls, PTSD patients took significantly longer to color-name PTSD words than to color-name neutral, OCD, and positive words. Because Stroop interference reflects involuntary semantic activation, it may provide a quantitative measure of intrusive cognitive activity--the hallmark symptom of PTSD.  相似文献   
967.
This study is to report a cross-cultural comparison on perceptions of icons and graphics and their relationships. Data were ratings of 10 icons and 10 graphics against 21 bipolar semantic differential scales from 325 college students in three countries, Mexico, Columbia, and Japan. Cross-cultural factor analyses resulted in the identification of four semantic (three affective and one denotative) features, three icon factors, and three graphic factors. Indigenous cultural means of these iconic and graphic factors were computed and used to probe cross-cultural similarities and differences in perceptions. Psychosemantics of icon factors were further predicted by graphic factors through canonical correlation. This study concludes the importance of implicit cultural meanings of nonverbal figures in intercultural communications. The implications of this study are also discussed.  相似文献   
968.
To see if suicide ideators responded differently than nonideators after success or failure experiences, 61 college students who were relatively high or low ideators participated in a computer task on which half got bogus success feedback, the other half got bogus failure feedback. Both groups then completed the Reasons for Living Inventory (RFL). Two (High versus Low Suicide) X 2 (Success or Failure) analyses indicated main effects for suicide on overall RFL and four of the six RFL subscales. Although there were no main effects for success versus failure, an interaction indicated that, in the failure condition, low suicidal subjects were significantly higher than high suicidal subjects in overall reasons for living. Results suggest that suicidal individuals may be vulnerable to failure, and may need interventions to help them avoid potential failure or to bolster their coping mechanisms.  相似文献   
969.
The purpose of this research was to investigate rule learning in reading disabled (RD) and normal children (chronological age and reading age (RA) match) when required to (a) abstract rules independently, and (b) use rules after instruction. Study 1 required the children to solve problems using shapes and letters. Although there was no difference between groups in the rate of problem solving when children were asked to abstract rules independently, the pattern of errors was different. The RD children made a greater proportion of errors on the negative instance for the more complex problems. In particular, this occurred on the letter task which involved psycholinguistic categorization. After instruction, the RA controls made more errors than the other groups. Study 2 was an analogous pseudoword reading task. Even with statistical adjustment for differences in prior grapheme-phoneme (g-p) rule knowledge, the RD children performed less accurately than the RA controls when they had to abstract rules, although this was restricted to the most difficult rule (rule of e). There was no difference after instruction in rule application, although the pattern of errors and post-test results indicated that the RD children continued to experience decoding difficulty. These results suggest a phonologically based productive deficit which interferes with the learning of g-p rules. This may be part of a more general language deficit which includes psycholinguistic categorization. Despite the severity of this handicap, RD children seem responsive to instruction.  相似文献   
970.
One group of normal elderly adults and two groups of cognitively impaired elderly adults were compared on an implicit and an explicit memory task. Degree of impairment affected explicit memory; the mildly and moderately impaired elderly adults demonstrated significantly reduced recognition performance. Degree of impairment also affected implicit memory priming performance, particularly for low frequency items, as measured by a word completion task. Explicit memory performance declined for both cognitively impaired groups, but implicit memory performance was sensitive to the degree or severity of impairment, causing a decline in performance only in the moderately impaired group.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号